my truck has never had a tach i have the cluster with the big gas gauge. from what i understand i can just plug in a cluster with a tach and have it work. i did see one on ebay that was within 2000 miles of mine so that would be nice.but i guess it's not that a big of deal if it's off.i have no intentions of selling the truck and am not trying to roll back the mileage. just one of the little upgrades that i'd like to do as i have minor trans issues and would like to see where it's actually shifting at. i really dont want to mount an external one on the dash so factory would be the way to go.

 

I would still write down both odometer reading at the time of the swap so you have it for a reference

 

Yeah this would be annoying especially when the move the same speed

 

That gas gauge would make me sad.

 

I did it not to long ago heres a link to the thread

https://dodgeforum.com/forum/2nd-gen...r-the-ram.html

 

With a gas gauge that big, you could literally watch it drop. If you're into that sort of thing. Yeah, I'm with you, I think I'd prefer the tach.

 

I have the fancy cluster and I can still watch my gas gauge drop...

 

i changed my cluster due to a sticky speedometer that didn't work right. here's the answer....

the mileage is stored in both the cluster odometer AND the pcm. what you see displayed is from the cluster. hidden away in the pcm is a second copy of the mileage. no dealer nor auto repair shop is allowed to tamper with the mileage and i don't think? they have the tools to tamper with them.

if you sell the truck - its illegal to change the mileage AND not disclose it to the buyer.

if you need a new cluster or pcm at the dealer, the dealer submits a certified mileage statement to somewhere - and they receive an updated part. the dealer is not authorized to make the changes due to the risk of them rolling back mileage. (imagine that). you'll pay an huge amount for a dealer cluster or pcm, probably about $1000 each.

now - if you buy a remanufactured pcm from one of the many companies that offer it - they'll happily post your VIN and mileage into it.

if you buy a junkyard cluster and install it, your truck will display the junkyard's mileage and your pcm will continue to record the actual mileage. i did this and as far as i can tell, it doesn't create a problem. if i ever sell the truck - then i have to disclose the mileage as "unknown". i assume that anyone with a scanner, or at least a dealer scanner, can see the mileage discrepancy. i wrote down the difference so i know.

if you swap your cluster, check that it matches what you want -
year
mileage display
tach/no tach
auto/manual - the PRNDL module was an insert on my 01.
gas/diesel ?? i don't recall if this is different or not.